[
http://issues.apache.org/jira/browse/LANG-263?page=comments#action_12414966 ]
analogue commented on LANG-263:
-------------------------------
/**
* <p>Checks if String contains a search String irrespective of case,
* handling <code>null</code>. This method uses
* [EMAIL PROTECTED] #contains(String, String)}.</p>
*
* <p>A <code>null</code> String will return <code>false</code>.</p>
*
* <pre>
* StringUtils.contains(null, *) = false
* StringUtils.contains(*, null) = false
* StringUtils.contains("", "") = true
* StringUtils.contains("abc", "") = true
* StringUtils.contains("abc", "a") = true
* StringUtils.contains("abc", "z") = false
* StringUtils.contains("abc", "A") = true
* StringUtils.contains("abc", "Z") = false
* </pre>
*
* @param str the String to check, may be null
* @param searchStr the String to find, may be null
* @return true if the String contains the search String irrespective of
* case or false if not or <code>null</code> string input
*/
public static boolean containsIgnoreCase(String str, String searchStr) {
if (str == null || searchStr == null) {
return false;
}
return contains(str.toUpperCase(), searchStr.toUpperCase());
}
public void testContainsIgnoreCase_StringString() {
assertFalse(StringUtils.containsIgnoreCase(null, null));
// Null tests
assertFalse(StringUtils.containsIgnoreCase(null, ""));
assertFalse(StringUtils.containsIgnoreCase(null, "a"));
assertFalse(StringUtils.containsIgnoreCase(null, "abc"));
assertFalse(StringUtils.containsIgnoreCase("", null));
assertFalse(StringUtils.containsIgnoreCase("a", null));
assertFalse(StringUtils.containsIgnoreCase("abc", null));
// Match len = 0
assertTrue(StringUtils.containsIgnoreCase("", ""));
assertTrue(StringUtils.containsIgnoreCase("a", ""));
assertTrue(StringUtils.containsIgnoreCase("abc", ""));
// Match len = 1
assertFalse(StringUtils.containsIgnoreCase("", "a"));
assertTrue(StringUtils.containsIgnoreCase("a", "a"));
assertTrue(StringUtils.containsIgnoreCase("abc", "a"));
assertFalse(StringUtils.containsIgnoreCase("", "A"));
assertTrue(StringUtils.containsIgnoreCase("a", "A"));
assertTrue(StringUtils.containsIgnoreCase("abc", "A"));
// Match len > 1
assertFalse(StringUtils.containsIgnoreCase("", "abc"));
assertFalse(StringUtils.containsIgnoreCase("a", "abc"));
assertTrue(StringUtils.containsIgnoreCase("xabcz", "abc"));
assertFalse(StringUtils.containsIgnoreCase("", "ABC"));
assertFalse(StringUtils.containsIgnoreCase("a", "ABC"));
assertTrue(StringUtils.containsIgnoreCase("xabcz", "ABC"));
}
> [lang] Add StringUtils.containsIgnoreCase(...)
> ----------------------------------------------
>
> Key: LANG-263
> URL: http://issues.apache.org/jira/browse/LANG-263
> Project: Commons Lang
> Type: New Feature
> Reporter: analogue
> Priority: Minor
> Fix For: 3.0
>
> To complement StringUtils.equalsIgnoreCase(...),
> StringUtils.containsIgnoreCase(...) would be quite useful. A simple
> implementation would uppercase both strings and delegate to
> StringUtils.contains(...).
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